diff --git a/packages/common/src/data/attachment.ts b/packages/common/src/data/attachment.ts
new file mode 100644
index 00000000..9f301bbf
--- /dev/null
+++ b/packages/common/src/data/attachment.ts
@@ -0,0 +1,30 @@
+import { ApiProperty } from '@nestjs/swagger'
+
+export class AttachmentUpdateData {
+    @ApiProperty()
+    name: string
+    @ApiProperty()
+    type: string
+}
+
+export class AttachmentAddData extends AttachmentUpdateData {
+
+}
+
+export class Attachment extends AttachmentAddData {
+    @ApiProperty()
+    productId: string
+    @ApiProperty()
+    issueId: string
+    @ApiProperty()
+    commentId: string
+    @ApiProperty()
+    attachmentId: string
+
+    @ApiProperty()
+    created: number
+    @ApiProperty()
+    updated: number
+    @ApiProperty()
+    deleted: number
+}
\ No newline at end of file
diff --git a/packages/common/src/rest.ts b/packages/common/src/rest.ts
index abd2b8e6..ee7afa4e 100644
--- a/packages/common/src/rest.ts
+++ b/packages/common/src/rest.ts
@@ -1,5 +1,6 @@
 import { JWK } from 'jose'
 
+import { Attachment } from './data/attachment'
 import { Comment, CommentAddData, CommentUpdateData } from './data/comment'
 import { Issue, IssueAddData, IssueUpdateData } from './data/issue'
 import { Member, MemberAddData, MemberUpdateData } from './data/member'
@@ -58,6 +59,14 @@ export interface CommentREST {
     deleteComment(productId: string, issueId: string, commentId: string): Promise<Comment>
 }
 
+export interface AttachmentREST<AA, AU, F> {
+    findAttachments(productId: string, issueId: string, commentId: string): Promise<Attachment[]>
+    addAttachment(productId: string, issueId: string, commentId: string, data: AA, file: F): Promise<Attachment>
+    getAttachment(productId: string, issueId: string, commentId: string, attachmentId: string): Promise<Attachment>
+    updateAttachment(productId: string, issueId: string, commentId: string, attachmentId: string, data: AU, file?: F): Promise<Attachment>
+    deleteAttachment(productId: string, issueId: string, commentId: string, attachmentId: string): Promise<Attachment>
+}
+
 export interface MilestoneREST {
     findMilestones(productId: string): Promise<Milestone[]>
     addMilestone(productId: string, data: MilestoneAddData): Promise<Milestone>